Halfway Between 13 and 643

When you ask "What number is halfway between 13 and 643?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=13 and Y=643.

Halfway Between Line

To find the number halfway between 13 and 643, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 13 and 643 into our formula, we get:

(13 + 643)/2 = 328

Thus, the number halfway between 13 and 643 is 328.

To check that our answer is correct, we subtract 13 from 328 and subtract 328 from 643 and compare the two numbers:

328 - 13 = 315
643 - 328 = 315

As you can see, the halfway number is 315 higher than 13 and 315 lower than 643. Therefore, our halfway between answer of 328 above is correct.

Halfway Between
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Halfway Between 13 and 644
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